《中考英语书面表达优秀范文赏析.docVIP

解： （1）A（0，2）， B（，1）． （2）． （3）如图1，可求得抛物线的顶点D（）． 设直线BD的关系式为， 将点B、D的坐标代入，求得，， ∴ BD的关系式为． 设直线BD和x 轴交点为E，则点E（，0），CE=． ∴? △DBC的面积为． ?  （4）如图2，过点作轴于点M，过点B作轴于点N，过点作轴于点P． ?  在Rt△AB′M与Rt△BAN中， ∵ AB=AB′， ∠AB′M=∠BAN=90°-∠B′AM， ∴ Rt△AB′M≌Rt△BAN． ∴ B′M=AN=1，AM=BN=3， ∴ B′（1，）． 同理△AC′P≌△CAO，C′P=OA=2，AP=OC=1，可得点C′（2，1）； 将点B′、C′的坐标代入，可知点B′、C′在抛物线上． （事实上，点P与点N重合） ? 一、 Great changes in my hometown More than twenty years ago, my hometown was just asmall , old and poor town. Most of people were farmers. There were fewfactories. The people didn’t have enough food to eat and wore old clothes. Theyhad a hard life . Great changes have taken place in the past twentyyears . The people have found a lot of ways of making money . Now there aremany tall buildings . They are very beautiful . Roads are wide and clean .People can take buses or drive their own cars to go to work . Many people havecell phones and personal computers. People’s living conditions have improved alot . Thanks to the government’s efforts . my hometown is becoming more andmore beautiful . ? 二、 Save the earth How to protect the environment has become one of thebiggest problems in the world . It’s our duty to protect our environment . No matterwhere we live , we should do something to keep our neighborhood clean and tidy. We can collect waste paper or other waste things for recycling. We shouldplant more trees and we should prevent those factories from pouring waste waterinto rivers, lakes and fields. Weshouldn’t leave rubbish everywhere and spit in public places . We mustn’t pickthe flowers or step on the grass in public. If everyone tries his best toprotect the environment , the world will become much more beautiful and ourlife will be better and better . ? ? 三、 Improve our environment Good environment can make people feel happy. Toimprove the environment means to qualify our life . What should we do toimprove our environment ? We should plant more trees . And we should preventthose factories fro